The double ball joiner consists of a 15mm ball on one end and a 25mm ball on the other. The 15mm ball is compatible with Rocky Creek’s range of phone holders, and the 25mm ball fits 25mm RAM arms.

Where the standard attachment on our phone holder is too short, use the double ball joiner with a longer RAM arm to move the mount clear. Useful for riders using tank bags or other accessories on their bars who need to mo